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arXiv 1012.5041cs.ITmath.ITphysics.data-an
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基于Fisher信息的Jensen散度

Jensen divergence based on Fisher's information

P. Sánchez-Moreno, A. Zarzo, J. S. Dehesa

摘要:

引入了概率分布间Jensen-Fisher散度的度量,建立了其理论基础。与其余的詹森发散相反,这个量对概率分布的波动非常敏感,因为它受(局部)费舍尔信息的控制,这是分布的梯度泛函。因此,在研究分布的相似性时,主要是对于那些具有振荡特征的分布,这是适当的和有益的。新的詹森-费雪发散与詹森-香农发散有以下共同的性质:非负性、适用于任意数量的概率密度时的可加性、在这些密度的交换下的对称性、当且仅当所有密度相等时为零,以及即使这些密度存在非公共零点时也是确定的。此外,Jensen-Fisher散度被示出为表示在相对Fisher信息方面的Jensen-Shannon散度在Kullback-Leibler或相对Shannon熵方面。最后,詹森-香农和詹森-费舍尔的分歧进行了比较,为以下三个大的,非平凡的和定性不同的家庭的概率分布:正弦,广义伽玛样和Rakhmanov-Hermite分布。

英文摘要:

The measure of Jensen-Fisher divergence between probability distributions is introduced and its theoretical grounds set up. This quantity, in contrast to the remaining Jensen divergences, is very sensitive to the fluctuations of the probability distributions because it is controlled by the (local) Fisher information, which is a gradient functional of the distribution. So, it is appropriate and informative when studying the similarity of distributions, mainly for those having oscillatory character. The new Jensen-Fisher divergence shares with the Jensen-Shannon divergence the following properties: non-negativity, additivity when applied to an arbitrary number of probability densities, symmetry under exchange of these densities, vanishing if and only if all the densities are equal, and definiteness even when these densities present non-common zeros. Moreover, the Jensen-Fisher divergence is shown to be expressed in terms of the relative Fisher information as the Jensen-Shannon divergence does in terms of the Kullback-Leibler or relative Shannon entropy. Finally the Jensen-Shannon and Jensen-Fisher divergences are compared for the following three large, non-trivial and qualitatively different families of probability distributions: the sinusoidal, generalized gamma-like and Rakhmanov-Hermite distributions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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